Definition of need :
1. A state that requires supply or relief; pressing occasion for something; necessity; urgent want.
2. Of necessity. See Needs.
3. Situation of need; peril; danger.
4. That which is needful; anything necessary to be done; ( pl.) necessary things; business.
5. To be in want of; to have cause or occasion for; to lack; to require, as supply or relief.
6. To be wanted; to be necessary.
7. Want of the means of subsistence; poverty; indigence; destitution.
priority, pack, duty, get hold of, collect, train, strike, guide, assume, film, sine qua non, ask, deprivation, bring, incumbency, needful, exigency, extremity, hire, accept, staple, over, gather up, lead, essential, affect, pauperism, without fail, read, penuriousness, motive, should, ingest, convey, occupy, regard, feature, desideratum, must-have, essence, office, learn, select, charter, acquire, motivation, fill, devoir, could do with something, have got, direct, element, ought, adopt, requisite, unavoidableness, poorness, take in, exigence, cry out for, call for, prerequisite, urgency, admit, indispensableness, impecuniosity, subscribe to, basis, burden, privation, deal, imply, quest, consider, motif, burning issue/question, of necessity, pick up, indispensable, take on, invite, rent, destituteness, compulsory, indigence, pauperisation, engage, key, conduct, command, posit, hold, penury, use up, take away, look at, concern, condition, fatality, pauperization, study, at all costs, rely on, bespeak, impoverishment, motivating, take up, impecuniousness, aim, destiny, precondition, drive, beggary, destitution, charge, have, contend, rich, exact, wishing, contain, depend on, inquire, make, needfulness, carry, postulate, take aim, get, pick out, obligatory, involve, emergency, request, responsibility, call, claim, choose, enquire, commitment, basic, take, shoot, fate, do, indispensability, remove, vital, lease, imperative, core, absence, consume, neediness, contract, submit, withdraw, necessary, subscribe
incompleteness (part of speech: noun)
gap, lack, deficiency, sectional, segmental, omission, fragmentation, insufficiency, shortcoming, deficit, hiatus, part, shortage, fraction, scantiness, shortfall, discontinuity, curtailment, incompleteness
lack (part of speech: verb)
desire (part of speech: verb)
hope, urge, eagerness, pine, fondness, lust, ardency, yearning, desire, yearn, acquisitiveness, longing, covetousness, craving, want, fancy, hunger, welcome, thirst, crave, itch, expect, passion, amorousness, greed, expectation, grasp, hanker, covet, wish, long
obligation (part of speech: noun)
poverty (part of speech: noun)
oblige (part of speech: verb)